What happened in Discogs in September 2019?

Normally I don't think too much about statistics of a particular month, but September is different, because of Discogs' "September Pledge Initiative" or "S.P.IN". You can read Discogs' own take on it on the Discogs blog, but let's see what the data says. If you don't know what everything here means, just look at the previous blog post and work your way back.

Release statistics

I looked at the dump file with data covering September 1 - October 3 2019 (according to the name of the datadump). This dump file has 11,653,094 releases, whereas the previous one had 11,530,540 releases. That means 122,554 releases more which is actually not more than in a normal month (at least, that's what I think). Also:

11,021,531 releases stayed the same
506,609 releases were changed
124,954 releases were added
2,400 releases were removed from the database
477 releases had status Draft, Deleted or Rejected
11 releases that were not Accepted were in both dumps
4 releases were moved from Draft to Accepted

Changes in the data (that is: changes to already existing releases) are distributed as follows:

Existing releases changed in September 2019

Smells

I found a bit over 2300 smells in newly added releases (ignoring tracklist errors which remain the bulk of the errors) so that seems to be a tiny bit more than normal. Like before: a bit more than half are label codes, a bit less than a quarter are SID codes, and then the rest, so it is exactly as in previous months.

Comments

SID codes (part 1)

One thing that I only learned about after using Discogs is the so called Source Identification Code, or SID. These codes were introduced in 1994 to combat piracy and to find out on which machines a CD was made. It was introduced by Philips and adopted by IFPI, and specifications are publicly available which clearly describe the two available SID codes (mastering SID code and mould SID code). Since quite a few months Discogs has two fields available in the " Barcode and Other Identifiers " (BaOI) section: Mould SID code Mastering SID code A few questions immediately popped up in my mind: how many releases don't have a SID field defined when there should be (for example, the free text field indicates it is a SID field)? how many releases have a SID field with values that should not be in the SID field? how many release have a SID field, but a wrong year (as SID codes were only introduced in 1994) how many vinyl releases have a SID code defined (which is impossi

SPARS codes (part 1)

Let's talk about SPARS codes used on CDs (or CD-like formats). You have most likely seen it used, but maybe don't know its name. The SPARS code is a three letter code indicating if recording, mixing and mastering were analogue or digital. For example they could look like the ones below. There is not a fixed format, so there are other variants as well. Personally I am not paying too much attention to these codes (I simply do not care), but in the classical music world if something was labeled as DDD (so everything digital) companies could ask premium prices. That makes it interesting information to mine and unlock, which is something that Discogs does not allow people to do when searching (yet!) even though it could be a helpful filter. I wanted to see if it can be used as an identifier to tell releases apart (are there similar releases where the only difference is the SPARS code?). SPARS code in Discogs Since a few months SPARS is a separate field in the Discogs

Country statistics (part 2)

One thing I wondered about: for how many releases is the country field changed? I looked at the two most recent data dumps (covering February and March 2019) and see where they differed. In total 5274 releases "moved". The top 20 moves are: unknown -> US: 454 Germany -> Europe: 319 UK & Europe -> Europe: 217 unknown -> UK: 178 UK -> Europe: 149 Netherlands -> Europe: 147 unknown -> Europe: 139 unknown -> Germany: 120 UK -> US: 118 Europe -> Germany: 84 US -> UK: 79 USA & Canada -> US: 76 US -> Canada: 65 unknown -> France: 64 UK -> UK & Europe: 62 UK & Europe -> UK: 51 France -> Europe: 51 Saudi Arabia -> United Arab Emirates: 49 US -> Europe: 46 unknown -> Japan: 45 When you think about it these all make sense (there was a big consolidation in Europe in the 1980s and releases for multiple countries were made in a single pressing plant) but there are also a few weird changes:

Vinyl & Data

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